I just picked one up from sunny coast for around ish $7000 with rear diff lock, i now wish i probably took the time and went down the path of importing one from cape town south africa. One's over there seem to be on tap and well priced to our dollar . . . heres a link to one which includes both front and rear diff locks and decoupler rear tyre carrier and other goodies, some hippie from germany is trying to sell up priced at $7500 (current conversion rate) and on top of that a shipping cost you could probably have yourself a nice tidy and well maintained and not to mention OPTIONED syncro. . . . you could easily get a quote to from a major shipping company out of cape town GOOGLE IT. . .
http://capetown.gumtree.co.za/c-Cars-for-Sale-cars-R35K-VW-Caravelle-Syncro-1991-W0QQAdIdZ83013486